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  • jsp (二) 练习

    package cn.sasa.serv;
    
    import java.io.IOException;
    import java.sql.SQLException;
    import java.util.List;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.commons.dbutils.QueryRunner;
    import org.apache.commons.dbutils.handlers.BeanListHandler;
    
    import cn.sasa.domain.MyUser;
    import cn.sasa.utils.C3P0Utils;
    
    public class UserServlet extends HttpServlet {
    
        private static final long serialVersionUID = 1L;
    
        protected void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            QueryRunner runner = new QueryRunner(C3P0Utils.getDataSource());
            String sql = "select * from user";
            List<MyUser> users = null;
            try {
                users = runner.query(sql, new BeanListHandler<MyUser>(MyUser.class));
            } catch (SQLException e) {
                e.printStackTrace();
            }
            request.setAttribute("users", users);//将获取到的list传到request域中,供jsp页面获取
            request.getRequestDispatcher("/MyUser.jsp").forward(request, response);
        }
    
        protected void doPost(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            doGet(request, response);
        }
    }
    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
        <%@ page import="java.util.*" %>
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
        <%
            List<cn.sasa.domain.MyUser> users = (List<cn.sasa.domain.MyUser>)request.getAttribute("users");
            if(users != null){
                for(cn.sasa.domain.MyUser user : users){
                    out.write(user.getName());
                    out.write("<br/>");
                }
            }
        %>
    
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/SasaL/p/10615816.html
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